Mucocutaneous lymph node syndrome (川崎病) 罹患児におけるベクトル心電図の検討

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  • VECTORCARDIOGRAMS IN CARDIOVASCULAR LESIONS ASSOCIATED WITH KAWASAKI DISEASE

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Cardiac involvement is one of the major complications of Kawasaki disease (mucocutaneous lymph node syndrome). Although the frequent association of coronary artery lesions in this disease is well known, other cardiac abnormalities such as myocarditis, arrhythmia and mitral insufficiency are not uncommon. In order to evaluate the usefulness of vectorcardiography in the diagnosis of cardiac involvement in this disease, quantitative analysis of serial Frank lead vectorcardiograms was performed in 100 patients.<BR>The outstanding vectorcardiographic findings in the early acute phase of the disease were (1) anterior displacement of the T loop, (2) decreased magnitude of the maximum QRS and T vectors and (3) decrease in the spatial length/width ratio (L/w ratio) of the T loop. Although the PR interval was usually prolonged in the third and the fourth weeks, this was not seen in cases with coronary aneurysm. The L/W ratio was smallest in the first week of the illness and the largest in the third week. The vectorcardiographic changes were more marked in cases with high erythrocyte sedimentation rates or long febrile periods and in those complicated with coronary aneurysm.<BR>The above findings suggest that vectorcardiography is of considerable value in detecting cardiac involvement in Kawasaki disease.

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